Flexible Snowshoe Binding Footbed for Natural Boot Flexion

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Solution Overview

Problem

Conventional snowshoe bindings immobilize the boot, preventing natural flexion at the metatarsal phalangeal joint during use, which can lead to discomfort and reduced ease of movement.

Innovation Solution

A flexible footbed in the snowshoe binding that allows bending at the metatarsal phalangeal joint, with a rigid toe area and adjustable straps to accommodate different boot widths, ensuring the boot flexes naturally without inhibition from harness elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the boot is bound immobilizingly to the snowshoe binding by straps at the toe area, over the arch area and around the rear of the boot on an inflexible footbed, then the boot is securely retained, but the boot cannot flex naturally at the metatarsal phalangeal joint during steps

Engineering Contradiction:

Improveboot retention securityVSAvoidnatural foot flexion

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The footbed is divided into distinct functional zones: a rigid toe area for secure retention, a flexible midfoot area allowing natural bending at the metatarsal phalangeal joint, and an arch area that provides support while permitting movement. This segmentation enables different parts of the footbed to perform different functions simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the footbed are assigned different mechanical properties - the toe area is rigid for secure engagement, while the midfoot area is flexible to allow natural bending. The arch area combines support with flexibility. This local differentiation resolves the contradiction between secure retention and natural movement.

Inventive Principle:

Principle #3Local quality

2Stability of the object's composition

If a rigid footbed is used to provide stable support, then the boot is firmly retained, but the boot cannot flex naturally during steps

Engineering Contradiction:

Improvefootbed structural stabilityVSAvoidboot flexion during steps

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The footbed structure is segmented into rigid and flexible portions, allowing the rigid toe area to provide stability while the flexible midfoot area enables natural bending during steps.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The footbed transitions from a completely rigid structure to a dynamic structure that can adapt its stiffness based on location and function. The flexible midfoot area allows the footbed to bend naturally during steps, while the rigid toe area maintains stability for retention.

Inventive Principle:

Principle #15Dynamics

3Reliability

If straps and harness elements are positioned to secure the boot firmly, then retention is improved, but the harness elements inhibit flexion at the metatarsal phalangeal joint

Engineering Contradiction:

Improveboot retentionVSAvoidflexion freedom

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The harness elements are extracted or removed from the midfoot area where they would inhibit flexion at the metatarsal phalangeal joint. The straps are positioned at the toe area and arch area only, allowing the midfoot to bend freely while maintaining secure retention through the toe and arch strap engagement.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS7472497B2Snowshoe binding with flexible footbed

Publication Date: 2009.01.06 K-2 CORPORATION

AI summary

A boot binding for a snowshoe, suspended within the snowshoe for flexibility of the boot relative to the snowshoe in the pitch direction, has a binding footbed that is flexible and allows bending of the boot in the pitch direction, as steps are taken by the user.